package com.lv.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.lv.common.R;
import com.lv.dto.DishDto;
import com.lv.pojo.Category;
import com.lv.pojo.Dish;
import com.lv.pojo.DishFlavor;
import com.lv.service.CategoryService;
import com.lv.service.DishFlavorService;
import com.lv.service.DishService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.*;

import java.util.List;
import java.util.Set;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

/**
 * 菜品管理
 * @Author:晓风残月Lx
 * @Date: 2022/5/4 15:30
 */
@Slf4j
@RestController
@RequestMapping("/dish")
public class DishController {

    @Autowired
    private DishFlavorService dishFlavorService;

    @Autowired
    private DishService dishService;

    @Autowired
    private CategoryService categoryService;

    @Autowired
    private RedisTemplate redisTemplate;


    /**
     * 新增菜品
     * @param dishDto
     * @return
     */
    @PostMapping
    public R<String> save(@RequestBody DishDto dishDto){
        log.info(dishDto.toString());

        // 调用服务层新增菜品
        dishService.saveWithFlavor(dishDto);

        // 清理所有菜品的缓存数据
//        Set keys = redisTemplate.keys("dish_");
//        redisTemplate.delete(keys);

        // 清理某个分类下面的菜品缓存数据
        String key="dish_"+dishDto.getCategoryId()+"_1";
        redisTemplate.delete(key);


        return R.success("新增菜品成功");
    }

    /**
     * 菜品信息分页查询
     * @param page
     * @param pageSize
     * @param name
     * @return
     */
    @GetMapping("/page")
    public R<Page> page(int page,int pageSize,String name){

        // 构造分页构造器对象
        Page<Dish> pageInfo=new Page<>(page,pageSize);
        Page<DishDto> dishDtoPage=new Page<>();

        // 条件构造器
        LambdaQueryWrapper<Dish> lambdaQueryWrapper=new LambdaQueryWrapper<>();
        // 添加条件
        lambdaQueryWrapper.like(name != null ,Dish::getName,name);
        // 添加排序条件
        lambdaQueryWrapper.orderByDesc(Dish::getUpdateTime);
        // 执行分页查询
        dishService.page(pageInfo, lambdaQueryWrapper);

        //对象拷贝
        BeanUtils.copyProperties(pageInfo,dishDtoPage,"records");

        List<Dish> records = pageInfo.getRecords();

        List<DishDto> list = records.stream().map((item)->{
            DishDto dishDto=new DishDto();

            BeanUtils.copyProperties(item,dishDto);

            Long categoryId = item.getCategoryId(); // 分类id
            // 根据id查询分类对象
            Category category = categoryService.getById(categoryId);
            if(category != null){
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }

            return dishDto;
        }).collect(Collectors.toList());

        dishDtoPage.setRecords(list);

        return R.success(dishDtoPage);
    }


    /**
     * 根据id查询菜品信息和对应的口味信息
     * @param id
     * @return
     */
    @GetMapping("/{id}")
    public R<DishDto> get(@PathVariable Long id){

        DishDto byIdWithFlavor = dishService.getByIdWithFlavor(id);
        return R.success(byIdWithFlavor);
    }

    /**
     * 修改菜品
     * @param dishDto
     * @return
     */
    @PutMapping
    public R<String> update(@RequestBody DishDto dishDto){
        log.info(dishDto.toString());

        dishService.updateWithFlavor(dishDto);

        // 清理所有菜品的缓存数据
//        Set keys = redisTemplate.keys("dish_");
//        redisTemplate.delete(keys);

        // 清理某个分类下面的菜品缓存数据
        String key="dish_"+dishDto.getCategoryId()+"_1";
        redisTemplate.delete(key);


        return R.success("修改菜品成功");
    }

    /**
     * 对菜品进行启售或停售
     * @param status
     * @param ids
     * @return
     */
    @PostMapping("/status/{status}")
    public R<String> status(@PathVariable("status") Integer status,@RequestParam List<Long> ids){
        log.info("status:{}",status);
        log.info("ids:{}",ids);

        dishService.updateStatus(status,ids);

        return R.success("售卖状态修改成功");
    }


    /**
     * 删除菜品
     * @param ids
     * @return
     */
    @DeleteMapping
    public R<String> delete(@RequestParam List<Long> ids){
        log.info(ids.toString());

        dishService.removeWithFlavor(ids);
        return R.success("删除菜品成功");
    }

    /**
     * 根据条件查询菜品
     * @param dish
     * @return
     */
//    @GetMapping("/list")
//    public R<List<Dish>> list(Dish dish){
//        log.info("dish:{}",dish);
//        // 条件构造器
//        LambdaQueryWrapper<Dish> queryWrapper=new LambdaQueryWrapper<>();
//        // 添加id条件
//        queryWrapper.eq(dish!=null,Dish::getCategoryId,dish.getCategoryId());
//        // 添加启售的条件
//        queryWrapper.eq(Dish::getStatus,1);
//        // 添加排序
//        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);
//
//        List<Dish> list = dishService.list(queryWrapper);
//
//        return R.success(list);
//    }


    /**
     * 根据条件查询菜品
     * @param dish
     * @return
     */
    @GetMapping("/list")
    public R<List<DishDto>> list(Dish dish){
        List<DishDto> dtoList=null;

        // 动态构造key
        String key="dish_"+dish.getCategoryId()+"_"+dish.getStatus();

        // 从redis中获取缓存数据
        dtoList= (List<DishDto>) redisTemplate.opsForValue().get(key);

        if(dtoList!=null){
            // 如果存在，直接返回无需查询数据库
            return R.success(dtoList);
        }


        log.info("dish:{}",dish);
        // 条件构造器
        LambdaQueryWrapper<Dish> queryWrapper=new LambdaQueryWrapper<>();
        // 添加id条件
        queryWrapper.eq(dish!=null,Dish::getCategoryId,dish.getCategoryId());
        // 添加启售的条件
        queryWrapper.eq(Dish::getStatus,1);
        // 添加排序
        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);

        List<Dish> list = dishService.list(queryWrapper);

         dtoList=list.stream().map((item)->{
            DishDto dishDto=new DishDto();

            BeanUtils.copyProperties(item,dishDto);

            Long categoryId = item.getCategoryId();

            Category category = categoryService.getById(categoryId);

            if(category!=null){
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }
            // 当前菜品的id
            Long dishId = item.getId();
            LambdaQueryWrapper<DishFlavor> flavorLambdaQueryWrapper=new LambdaQueryWrapper<>();
            flavorLambdaQueryWrapper.eq(DishFlavor::getDishId,dishId);

            List<DishFlavor> dishFlavorList=dishFlavorService.list(flavorLambdaQueryWrapper);
            dishDto.setFlavors(dishFlavorList);
            return dishDto;

        }).collect(Collectors.toList());

        // 如果不存在，需要查询数据库，将查询到的菜品数据缓存到Redis
        redisTemplate.opsForValue().set(key,dtoList,60, TimeUnit.MINUTES);

        return R.success(dtoList);
    }
}
